A leading provider of high-end storage hardware, software and services. Part of the Information Systems & Telecommunications Division of Hitachi Ltd., Hitachi Data Systems (HDS) was founded in 1989 when Hitachi and EDS acquired National Advanced Systems (NAS) from National Semiconductor.
NAS was formed in 1979 when National Semiconductor took over Itel's Computer Products Group, which had been selling National's IBM-compatible mainframes. Later, NAS ceased manufacturing and marketed systems from Hitachi. For many years, Hitachi sold IBM-compatible mainframes, but later exited the business. See Hitachi-LG Data Storage
An HDS Mainframe
Hitachi Data Systems sold its Skyline series of IBM-compatible mainframes to Fortune 500 companies. (Image courtesy of Hitachi Data Systems.)